I have had a pair of these for ages and found them hard to use, always needing loads of filing to the rail and after trying to cut a point motor rod had managed to dent a big hole in one side of them.
So, when I went to my local model shop to get some track I was going to get a new saw to cut it. However, after a quick demonstration of how to use them properly (!) decided to get a new pair and try them.
What can I say, they are so simple and have saved so much time. It just goes to show that ready instructions shouldn't always be a last resort!
Thanks John & 53a Models!